* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

.item-list {
  width: 720px;
  margin: 30px auto;
  outline: 1px solid;
  overflow: hidden;
}

.item-list img {
  width: 150px;
  float: left;
  margin: 20px;
}

